A Practical Study Of Online And Offline Integrated Teaching In Middle School Chemistry

2020 during the epidemic of COVID-19,universities,primary and secondary schools in China launched a grand online distance teaching practice,which provided a great deal of online teaching experience for "Internet + Education".This study takes the online and offline integrated teaching in the later stage of the epidemic as the starting point,which provides a good transition way and educational reference for the upcoming offline resumption of classes,making it easier for students to adapt to the development of the times.In practice,it has important reference significance for the reform of teachers' teaching methods,provides a new teaching-oriented reference,and realizes the transformation from classroom knowledge-oriented to student-oriented autonomous learning.The specific studies are as follows:(1)For teachers and students,the questionnaires were designed from the four aspects of cognition,content,method and effect to study the current situation of online and offline teaching and integrated teaching in middle school.Due to the popularity of mobile phones and computers,teachers and students were more proficient in the use of electronic products and Internet,so that online teaching could be carried out smoothly and achieved the desired results.The survey showed that teachers and students agreed that basic and review teaching contents were suitable for online teaching and learning stages,and online teaching were suitable for preview and review stages.Teachers and students thought that the effect of offline classroom teaching was better than that of online teaching for the difficulty of online supervision and poor self-discipline of middle school students,and online leaching had advantages in preview,knowledge expansion and micro-macro.In view of the self-discipline of middle school students and the temptation of the Internet,the survey results suggested that in the online and offline integrated teaching design of middle schools,the classification and reorganization of teaching contents,the selection of Internet resources,and the diversified integration of teaching methods should be paid to more attention to achieve people-oriented teaching and to expand students' creative thinking.(2)To construct the specific teaching process of "pre-class preparation--online preview--offline learning(situation creation--organizing learning activities--classroom summary)--after-class review and evaluation--reflection and redesign",and to elaborated the suggestions for the integrated use of online teaching resources in offline classroom teaching with taking the teaching content of chemistry compulsory stage as an example.They included:(1)The Internet resources were used to preview the learning content,to pave the way for knowledge and to introduce the background and so on,so as to cultivate students' interest in learning and their desire to explore knowledge.(2)The online resources and classroom teaching were combined.The online teaching resources were used to create real situations,to provide inquiry clues or to show experimental phenomena,so as to improve the classroom activity of offline teaching and cultivate students' self-cognition and thinking.(3)The classroom records were sorted out and made into online review materials that students could choose to watch repeatedly.The curriculum evaluation,assignment and revision were used online methods which were helpful to save teachers' time and made teachers have more energy to pay attention to students.(3)The teaching design and teaching practice of "material structure and element periodic law" were carried out.Based on the requirements of the new curriculum standard and the analysis of the contents of the teaching materials,the online and offline integrated teaching design was carried out,and the teaching practice was carried out in the first year of the new senior high school.Three methods of teaching activity evaluation,student group mutual evaluation and interview evaluation were used to evaluate the practice of online and offline integrated teaching.The results showed that the online and offline integrated teaching could obviously improve students' classroom participation,and make up for the deficiency of single online teaching communication and supervision and the disadvantages of offline teaching across the board.The hierarchical teaching for students with objective differences could meet the needs of students' personality development.However,the integrated teaching was effect by the scope of the object of study,school management regulations and students' academic pressure,the completion of online preview and homework were not ideal.